Daypacks should be < 20lbs.
Overnight packs could be 30-60lbs. Multi-day trips up a serious mountain may be closer to 60lbs.
Soldiers in the military sometimes carry substantially more:
- sometimes up to 100 lbs, or even 130 lbs!
- 70 to 80 pounds daily
- A 2001 Army Science Board study recommended that no soldier carry more than 50 pounds for any length of time.